New organic-air flow fuel cell and electrolyser for stationary energy storage

AbstractNa-ion batteries have been considered promising candidates for stationary energy storage. However, their wide application is hindered by issues such as high cost and insufficient electrochemical performance, particularly for cathode materials. Here, we report a solvent-free mechanochemical protocol for the in-situ fabrication of sodium vanadium fluorophosphates. Benefiting from the nano-crystallization features and extra Na-storage sites achieved in the synthesis process, the as-prepared carbon-coated Na3(VOPO4)2F nanocomposite exhibits capacity of 142 mAh g−1 at 0.1C, higher than its theoretical capacity (130 mAh g−1). Moreover, a scaled synthesis with 2 kg of product was conducted and 26650-prototype cells were demonstrated to proof the electrochemical performance. We expect our findings to mark an important step in the industrial application of sodium vanadium fluorophosphates for Na-ion batteries.

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Fuzzy Controller for Energy management and SoC Equalization for DC Microgrids Powered by Fuel Cell and Energy Storage Systems

IEEE Journal of Emerging and Selected Topics in Industrial Electronics ◽

10.1109/jestie.2021.3088419 ◽

2021 ◽

pp. 1-1

Author(s):

Thales Augusto Fagundes ◽

Guilherme Henrique Favaro Fuzato ◽

Plinio Goncalves Bueno Ferreira ◽

Mauricio Biczkowski ◽

Ricardo Quadros Quadros Machado

Keyword(s):

Energy Storage ◽

Fuel Cell ◽

Energy Management ◽

Fuzzy Controller ◽

Storage Systems ◽

Energy Storage Systems ◽

Dc Microgrids

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Solid-State Ball-Milling of Co3O4 Nano/Microspheres and Carbon Black Endorsed LaMnO3 Perovskite Catalyst for Bifunctional Oxygen Electrocatalysis

Catalysts ◽

10.3390/catal11010076 ◽

2021 ◽

Vol 11 (1) ◽

pp. 76

Author(s):

Chelladurai Karuppiah ◽

Balamurugan Thirumalraj ◽

Srinivasan Alagar ◽

Shakkthivel Piraman ◽

Ying-Jeng Jame Li ◽

...

Keyword(s):

Electron Microscopy ◽

Energy Storage ◽

Fuel Cell ◽

Solid State ◽

Carbon Black ◽

Ball Milling ◽

Potential Candidate ◽

X Ray ◽

Bifunctional Electrocatalyst ◽

Bet Analysis

Developing a highly stable and non-precious, low-cost, bifunctional electrocatalyst is essential for energy storage and energy conversion devices due to the increasing demand from the consumers. Therefore, the fabrication of a bifunctional electrocatalyst is an emerging focus for the promotion and dissemination of energy storage/conversion devices. Spinel and perovskite transition metal oxides have been widely explored as efficient bifunctional electrocatalysts to replace the noble metals in fuel cell and metal-air batteries. In this work, we developed a bifunctional catalyst for oxygen reduction and oxygen evolution reaction (ORR/OER) study using the mechanochemical route coupling of cobalt oxide nano/microspheres and carbon black particles incorporated lanthanum manganite perovskite (LaMnO3@C-Co3O4) composite. It was synthesized through a simple and less-time consuming solid-state ball-milling method. The synthesized LaMnO3@C-Co3O4 composite was characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, transmission electron microscopy, Brunauer-Emmett-Teller (BET) analysis, X-ray diffraction spectroscopy, and micro-Raman spectroscopy techniques. The electrocatalysis results showed excellent electrochemical activity towards ORR/OER kinetics using LaMnO3@C-Co3O4 catalyst, as compared with Pt/C, bare LaMnO3@C, and LaMnO3@C-RuO2 catalysts. The observed results suggested that the newly developed LaMnO3@C-Co3O4 electrocatalyst can be used as a potential candidate for air-cathodes in fuel cell and metal-air batteries.

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